Drill.



' no. 634,502. V Patented Oct. 1,1899.

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DRILL.

v fiApplicl-tion. filed Dec. 22, 1898.)

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AOW'ZE D A HiNGTON D OW. ho a 5 77146222 4 no. 634,502. Patented Oct.:0, I899.

M. M. MOORE.

DRILL.

(Application filed Dec. 22, 1898.) (No Iodei.) 3 Sheets-Sheet 2.

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No. 634,502. Patented l]1:t. l0,l899.

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DRILL. (Appliution mu: Due. as, 1895,

3 Shots-Shut 3 l (Nu Nodal-J UNITED STA'rEs PATENT OFFICE.

oses i1. MOORE, or orIIoAeo HEIGHTS, ILLINOIS, ASSIGNOR TO THE o a 0COMPANY, or CHICAGO, ILLINOIS.

DRlLL.

SPECIFICATION forming part of Letters Patent No. 634,502, dated October10, 1899.

ApplicationfiletlDecemberZZ,1898. Serial No. 700,002. (No model.)

To all whont it ntay concern:

Be it known that I, MOSES M. MOORE, a citi zen of the United States,residing at Chicago Heights, in the county of Cook and State of show theconnection between the feed-screw and drill-spindle, the mitergear andthe cam and lever which actuate the nut of the feed-screw beingindicatedin dotted lines,

In this figure the" drill is shown in its advanced position, havingpassed through the web of a rail, andthe devices for automaticallywithdrawing the drill are shown as in engagement with the's'pur-gears ofthe spindle miter-gear and the fe e'd 'nut. Fig. 3 is an ens largeddetached longitudinal section of the drill-spindle and its miter-gearand spur-gear, the feed-screw, its feed-nut and spur-gear, and'theshifting rod or shaft and pinions, whereby the miter-gear of the spindleand the feed-nut are coupled or connected for automatically and rapidlyadvancing or with{ drawing the drill; and Fig. 4 is a transverse sectionof the devices, taken on the line 4 l,

I for the support of the operative mechanism,

Fig. 2.

Like symbols refer to like parts wherever they occur. r I

My invention relates generally to portable drilling apparatus,and hasbeen especially devised for use as a rail-drill for drilling the webs ofrails when in position in the track, but is not to be taken as limitedthereto, as certain features of construction will be found ofgeneralutility in this class of apparatus.

The main objects in view are,'first, the provision of meansfor rapidlyand automatically withdrawing'or advancing the drill when it becomesnecessary to advance it to or with..

draw it from the rail-web or other article operated upon, and, second,the provision of a simple and efficient coupling between the rotatable drill-spindle and n on-rotatable feedscrew which will insure the controlof the longitudinal or ehdwise movement of the spindle by the feed-screwwithout interference with the rotation of the spindle.

In order to secure the first of the abovenoted objects,'I combine withthe gearing which actuates the drill-spindle and the feedscrew thereofan endwise-movable shaft having an attached pinion and a pinion throughwhich the shaft moves, the latter pinion being in constant gear with thefeed-nut, whereby the feed-screw may be actuated from and simultaneouslywith the drill-spindle, and

such a combination or its equivalent embodies one feature ofmyinvention.

In order to secure the second object above noted, I combine thedrill-spindle and feedscre'w by means of a shell or box, a detachablecollar or plug, and an interposed ballrace and balls, whereby anantifriction end bearing between the parts is provided and a closeconnection of the spindle and feedscrew for purposes of longitudinalmovement is obtained, and such a combination or its equivalent embodiesanother feature of my invention. 7

There are other minor features of invention, all as will hereinaftermore fully appear.

I will now proceed to describe my invention more fully, so that othersskilled in the art to which it appertains may apply the same. r I I Inthe drawings,A indicates the main frame said frame having at its frontend lateral guide-lugs Ct a, through which pass links 13 B, that carrythe pivoted clamp-hooks b b, and having journaled at its rear a shaft 0,provided at its ends with crank-pins c c, with feed-screw G, saidfeed-nut F also providedwith a spur-gear f, the counterpart of that uponthe miter-gear of the drill-spindle.

E indicates the drill-spindle, provided with a keyway 6 (see Fig. 3) forthe reception of a key (1 or splinein the hub of the miter-gear D,whereby the drill-spindle is caused to rotate with the miter-gear D,though capable of endwise movement independently of the miter-gear.

G indicates the feedscrew for the drillspindle E, to which the feed-nutF imparts an endwise motion, the feed-screw being secured againstrotation, will hereinafter appear.

Secured to the end of feed-screw G by a pin g or in other suitablemanner is a shell or box H, threaded, as at 72, for the reception ofa-threaded annular plug or collar I, which loosely surrounds theadjacent end of drillspindle E, and fitted closely within the box H andbearing on the end of feed-screw G is a hardened disk g, grooved to forma raceway for antifriction-balls 9 while the adjacent end ofdrill-spindle E is capped by a hardened disk e, secured thereto by ascrew 0 or in other suitable manner and project-' ing beyond thedrill-spindle, so that the spindle shall be confined to the box II bymeans of the annular plug I, though capable of rotation within saidplug. In fitting up the parts the loose annular screw-plug I will bepassed over the drill-spindle shaft before the hardened disk 6 issecured to said spindle.

K indicates a cross-bar or saddle arranged to slide longitudinallywithin the frame A upon ways or guides 7a, and to said saddle orcross-bar the box or shell H is secured by screws 01 in other suitablemanner, so that the box 70 and feed-screw H are prevented from rotating,while the free endwise movement of the feed-screw F is not interferedwith.

Lindicates a removable cap-plate or'bridge (see Fig. 1) which spans theframe A, is supported thereon and secured thereto, and which cap-plateor bridge carries a vertical tube Z, in which is journaled the shaft Mfor applying the power to rotate the drill-spindle. Shaft M is providedabove (see Fig. 1) with a miter-gear M, with which engages a mitergear Non the shaft N and below with a miter-gear h which meshes with themitergear D of the drill-spindle and in addition thereto is providedwith a cam (see dotted lines, Fig. 2) which through the medium of alever O, pivoted on the frame A, and a spring pawl or dog 0 actuates thefeed-nut F of the feed-screw G. The shaft N, which carries themiter-gear N, is journaled in a yoke or bracket 71, supported on theupperend of tube Z, and said shaft may be provided with the usualcrank-handle commonly used for rotating such a shaft.

Journaled on the frame A, at one side thereof, (see Figs. 2 and 3,) is ashaft P, provided at one end with a knob P and capable of endwisemovement in its bearings. This shaft P is provided at one end with apinion 19, secured thereto by a pin 19 or in other suitable manner whichwill insure the movement of said pinion endwise with the shaft, and atits opposite end with pinion 19 provided with a key or spline 29 whichtravels in a keyway p of the shaft P, so that said second pinion willrotate with the shaft P, but will permit the shaft to move endwisethrough said pinion. The first-noted pinion p is adapted to mesh withspur-gear d of miter-gear D when the shaft P is pushed forward and to bedisengaged therefrom when the rod or shaft P is pulled back, while thesecond pinion 19 remains in permanent mesh with the spur-gear f offeed-screw F, beinglocated between two bearings or other suitableprovision to accomplish-the same being made.

The construction of the devices being substantially of the characterhereinbefore pointed out, their operation will be as follows: Assumingthe drill-to be withdrawn and the parts in the position shown withrelation to a track-rail-that is to say, the clamp-hooks b I) passedover the rail and bearing upon the web thereof, which has beenaccomplished by throwing the lever 0 forward into the position shown inFig. 1, so as to rotate the crank-shaft O c c and retract the links B B,which carry the pivoted clamp-hooks b 11- the shaft N is rotated bymeans of a suitable crank-handle and through miter-gears N M, shaft M,miter-gears h 2 and D rotates the drill-spindle E. At the same time thecam (see dotted line, Fig. 2) actuates lever O, which through the mediumof dog or pawl 0 rotates the feed-nut F and (as the feed-screw is fixedagainst rotation) causes the endwise movement of the feed-screw G andthe advance of the drill-spindle E and its drill. During the foregoingor drilling operation of the appliances the rod or shaft P has beendrawn back, (see Fig. 3,) so that pinion 13 is out of mesh with thespur-gear cl on mitergear D; but as soon as the drilling operation isfinished the operator first lifts the dog 0 of lever 0 out of engagementwith feed-nut F and then pushes the shaft or rod P forward (see Fig. 2)until the pinion p meshes with spur-gear cl, whereupon a rapid reverserotary motion is imparted from miter-gear D, through its spur-gear d,pinion p, shaft P, and pinion 19 to spur-gear f on feed-nut F, andfeed-screw G is rapidly withdrawn,carrying with it the drill-spindle,which, as before noted, has an endwise movement through its miter-gearD. It is desirable to completely free the drill from its work (thetrack-rail) before the withdrawal movement is arrested, after which thedrill canbe rapidly advanced to its work by the reverse motion of theshaft- N as preliminary to the next drilling opera tion, after which thedog 0 of lever Ois replaced in engagement with feed-nut F, and thedrilling operation and slow feed of the drill-spindle will proceed asbefore.

Having thus described my invention, what and a saddle or slide movableon the main frame and which carries the feed-screw, substantially as andfor the purposes specified.

2. In a drill, the combination with a main frame, a driving-gearjournaled thereon, a drill-spindle movable with and through thedriving-gear, a feed-nut, a feed-screw, a saddle or slide movable on themain frame and with which the fe ed-screw is connected, and anantifriction ball-bearing interposed between the drill-spindle andfeed-screw, substantially as and for the purposes specified.

3. In a drill, the combination of a main frame, a driving-gear and apinion jou'rnaled thereon, a drill-spindle movable with and through saiddriving-gear and pinion, a feednut and pinion, a feed-screw, a saddle orslide movable on the main frame and with which the feed-screw isconnected, a sliding shaft having an attached pinion and a loose pinion,the latter being in constant gear with the pinion of the feed-nut andthe former adapted to engage the pinion of the driving-gear,substantially as and for the purposes specified.

l. In a drill, the combination with a drillspindle and its feed-screw ofinterposed hardened disks one of said disks attached to thedrill-spindle, and a coupling-box and annular plug for connecting thedrill-spindle with the feed-screw, substantiallyas and for the purposesspecified. 1

In testimony whereof I affix my signature, in presence of two witnesses,this 16th day of December, 1898.

MOSES M. MOORE.

Witnesses:

W. W. HOLMES, CHAS. H. JoHNsoN.

